Answer:
1. The population will increase as they're better adapted to their environment and have a higher survival rate due to this helpful phenotype.
2. This happens to the population because this helpful phenotype might lead to less exposure to predation in which leads to a better survival fitness for the organism.
3. This mutation continues to exist as the organisms continue to successfully reproduce into the population due to being able to survive for longer.
They are all water related diseases. Cholera and typhoid are diseases caused by drinking contaminated water by bacterias Vibrio cholerae and Salmonella typhi respectively. However while yellow fever is caused by the bite of an infected mosquito vector, the mosquito use water bodies to reproduce. Their larvae form require water to develop.
You can find the number of neutrons by subtracting the number of protons from the atomic mass
Is there any thing you left out from your question. its not very clear on what exactly you want me to answer.
